What do I say about why I left my last job?, hotel front-desk agent here

I have an interview next week and I am unsure how to explain why I left my last job as a hotel front-desk agent. I do not usually post, so bear with me. I also do not want to seem like a risk. What do you say?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.